1999/07/22 by Y. G., Y. G. Ma, Q. M. Su +9 · 4 citations
Physics and Astronomy · #Advanced Chemical Physics Studies #Nuclear physics research studies #Scientific Research and Discoveries #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.60.024607
published as Phys.Rev. C60 (1999) 024607 · 9 Pages, 8 figures
openalex publication_date 1999/07/22 · arxiv created 2000/10/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Features of particle emission and critical point behavior are investigated as functions of the isospin of disassembling sources and temperature at a moderate freeze-out density for medium-size Xe isotopes in the framework of the isospin-dependent lattice gas model. Multiplicities of emitted light particles, isotopic, and isobaric ratios of light particles show the strong dependence on the isospin of the dissociation source, but double ratios of light isotope pairs and the critical temperature determined by the extreme values of some critical observables are insensitive to the isospin of the systems. Values of the power law parameter of cluster mass distribution, mean multiplicity of intermediate mass fragments (IMF), information entropy, and Campi's second moment also show a minor dependence on the isospin of Xe isotopes at the critical point. In addition, the slopes of the average multiplicities of the neutrons (Nn), protons (Np), charged particles (NCP), and IMFs (NIMF), slopes of the largest fragment mass number (Amax), and the excitation energy per nucleon of the disassembling source (E*/A) to temperature are investigated as well as variances of the distributions of Nn, Np, NCP, NIMF, Amax, and E*/A. It is found that they can be taken as additional judgements to the critical phenomena.